1. a Center for Health Equity Research and Promotion (CHERP) , Philadelphia VA Medical Center , Philadelphia, Pennsylvania, USA
2. b Department of Psychiatry , University of Rochester School of Medicine , Rochester, New York, USA
3. c Departments of Emergency Medicine and Research , Michigan State University/Kalamazoo Center for Medical Studies , Kalamazoo, Michigan, USA
4. d Department of Family Medicine and Community Health , University of Pennsylvania , Philadelphia, Pennsylvania, USA
5. e Department of Emergency Medicine and School of Social Policy & Practice , University of Pennsylvania , Philadelphia, Pennsylvania, USA